TRAVIS SCOTT KYLIE JENNER'S MY MAIN SQUEEZE

Kylie Jenner and Travis Scott hug and kiss when they say goodbye ... and play a little grab ass too.

Kylie was with the rapper at his home in L.A. for a couple hours Wednesday before they walked out together and packed on the PDA in front of her ride. Kylie didn't leave without also getting a piece ... of art, that is.

As we reported ... Kylie and Travis have been inseparable since Coachella and are way beyond a casual relationship.

It looks like their affection hasn't changed a bit ... even though her hair color has.